LB11827-E

Overview

The LB11827-E is a three-phase motor driver manufactured by onsemi. It is designed for driving brushless DC motors in applications such as hard disk drives and optical disk drives. The component operates within a supply voltage range of 4.75 V to 5.25 V and supports load voltages up to 45 V. It features a bipolar output configuration with a maximum output current of 1.5 A. The device is housed in a DIP-28 package and is rated for operation between -20°C and +85°C.

Feature Summary

• Integrated three-phase bridge driver for brushless DC motors
• Built-in protection mechanisms against overcurrent and thermal overload
• Compatible with standard TTL logic input levels

Applications

• Hard disk drive spindle motor control
• Optical disk drive actuator systems
• Small fan speed regulation

Procurement Notes

Verify the specific revision level and date code upon receipt, as manufacturing processes may evolve. Confirm RoHS compliance status through official documentation, as historical batches may differ. Ensure the DIP-28 package integrity is intact during handling. Cross-reference the part number with the manufacturer's latest discontinuance notifications to confirm availability and lifecycle status before finalizing procurement plans.

Selection Notes

Select this component when designing low-voltage (5V) systems requiring integrated three-phase drive capabilities. It is suitable for applications where space constraints favor a single-chip solution over discrete MOSFET arrangements. Consider the 1.5 A current limit and 45 V load voltage rating to ensure compatibility with the target motor specifications. Verify that the operating temperature range meets the environmental requirements of the end product.

Part Context

This part belongs to onsemi's portfolio of motor controllers and drivers, specifically targeting precision motion control in data storage devices. It integrates the gate drive circuitry and power stage into a single package, simplifying the design process for brushless DC motor applications. The series is known for reliability in consumer electronics and computer peripheral subsystems.

Replacement Considerations

Check for direct pin-compatible alternatives within the same family or from other manufacturers if the LB11827-E is discontinued. Verify electrical parameter equivalence, particularly output current and voltage ratings. Review functional compatibility regarding control signals and protection features before substitution.